The Experts below are selected from a list of 123 Experts worldwide ranked by ideXlab platform
M Duclos - One of the best experts on this subject based on the ideXlab platform.
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training and 24 hr urinary Catecholamine Excretion
International Journal of Sports Medicine, 2009Co-Authors: Edith Filaire, M Rouveix, M DuclosAbstract:We examined the effects of 28 weeks of training on 24-hr urinary Catecholamine Excretion and mood (evaluated using the Recovery-Stress Questionnaire for Athletes RESTQ-Sport) among seven national young female tennis players. Data were collected after a 1-month rest (September, T (1)), 3 months after T1(T2) and 7 months after T1(T3). Standardized Stress and Standardized Recovery scores and RESTQ-Index were computed. The training load increased by 161 % between T1 and T2 and by 55 % between T2 and T3. The performance (wins/total number of matches) decreased throughout the study. Urinary Catecholamine Excretion presented an U-shaped curve with a significant increase in 24-hr urinary Catecholamine Excretions, and epinephrine/norepinephrine ratio from T1 to T2 (T1 vs. T2: epinephrine: + 100 %, p < 0.05; norepinephrine: + 30 %, p < 0.05. Then, at T3, urinary Catecholamine Excretions and the epinephrine/norepinephrine ratio decreased significantly to values lower than the values observed at T1. A decrease in RESTQ-Index throughout the study was mainly based on a large increase in the Standardized Stress score. Changes in specific stress and recovery scales of the RESTQ-Sport for athletes and changes in Catecholamine values indicated a state of heavy training stress and incomplete recovery at the end of the study.
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24 hr urinary Catecholamine Excretion training and performance in elite swimmers
International Journal of Sports Medicine, 2006Co-Authors: D Atlaoui, M Duclos, Caroline Gouarne, Lucien Lacoste, Frederic Barale, Jeanclaude ChatardAbstract:The aim of the present study was to investigate the effects of training variations on 24-hr urinary noradrenaline (NA) and adrenaline (Ad) levels and the adrenaline/noradrenaline (Ad/ NA) ratio to search for a possible relationship between Catecholamine Excretion, training, and performance in highly trained swimmers. Fourteen swimmers (5 female and 9 male) were tested after 4 weeks of intense training (IT), 3 weeks of reduced training (RT), and 5 weeks of low training (LT). At the end of each period, the swimmers performed their best event at an official competition. Individual performances were expressed as percentage of the previous season's best performance. The changes in NA levels after 4 weeks of IT were negatively related to changes in training volume (r = - 0.70, p < 0.01) and total training load (r=-0.68, p<0.02). NA levels measured at the end of IT were positively related to changes in performance after three weeks of RT (r = 0.77, p < 0.01). The percentage changes in performance between RT and LT were related to NA levels at the end of RT (r = 0.60; p < 0.04). Ad/NA ratios and Ad were related to performance (r=0.58, p<0.01; r=52, p<0.01; respectively). The differences in Ad/NA ratios and Ad between two consecutive competitions were related to the differences in performance (r=0.59, p<0.01; r=0.49, p<0.01; respectively). 24-hr NA and the Ad/NA Excretion ratio were related to both training variations and performance. Thus, 24-hr NA levels and Ad/NA ratio may provide useful markers for monitoring training stress in elite swimmers.
Roger K Pitman - One of the best experts on this subject based on the ideXlab platform.
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twenty four hour urinary cortisol and Catecholamine Excretion in combat related posttraumatic stress disorder
Biological Psychiatry, 1990Co-Authors: Roger K PitmanAbstract:Heightened adrenal cortical activity is a classic component of the stress response. Elevation of 24-hr Excretion of urinary-free cortisol (UFC) has been documented in depressive disorder. We measured 24-hr UFC and Catecholamine Excretion in ambulatory Vietnam veteran PTSD patients and mentally healthy combat controls
Edith Filaire - One of the best experts on this subject based on the ideXlab platform.
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training and 24 hr urinary Catecholamine Excretion
International Journal of Sports Medicine, 2009Co-Authors: Edith Filaire, M Rouveix, M DuclosAbstract:We examined the effects of 28 weeks of training on 24-hr urinary Catecholamine Excretion and mood (evaluated using the Recovery-Stress Questionnaire for Athletes RESTQ-Sport) among seven national young female tennis players. Data were collected after a 1-month rest (September, T (1)), 3 months after T1(T2) and 7 months after T1(T3). Standardized Stress and Standardized Recovery scores and RESTQ-Index were computed. The training load increased by 161 % between T1 and T2 and by 55 % between T2 and T3. The performance (wins/total number of matches) decreased throughout the study. Urinary Catecholamine Excretion presented an U-shaped curve with a significant increase in 24-hr urinary Catecholamine Excretions, and epinephrine/norepinephrine ratio from T1 to T2 (T1 vs. T2: epinephrine: + 100 %, p < 0.05; norepinephrine: + 30 %, p < 0.05. Then, at T3, urinary Catecholamine Excretions and the epinephrine/norepinephrine ratio decreased significantly to values lower than the values observed at T1. A decrease in RESTQ-Index throughout the study was mainly based on a large increase in the Standardized Stress score. Changes in specific stress and recovery scales of the RESTQ-Sport for athletes and changes in Catecholamine values indicated a state of heavy training stress and incomplete recovery at the end of the study.
Jeanclaude Chatard - One of the best experts on this subject based on the ideXlab platform.
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24 hr urinary Catecholamine Excretion training and performance in elite swimmers
International Journal of Sports Medicine, 2006Co-Authors: D Atlaoui, M Duclos, Caroline Gouarne, Lucien Lacoste, Frederic Barale, Jeanclaude ChatardAbstract:The aim of the present study was to investigate the effects of training variations on 24-hr urinary noradrenaline (NA) and adrenaline (Ad) levels and the adrenaline/noradrenaline (Ad/ NA) ratio to search for a possible relationship between Catecholamine Excretion, training, and performance in highly trained swimmers. Fourteen swimmers (5 female and 9 male) were tested after 4 weeks of intense training (IT), 3 weeks of reduced training (RT), and 5 weeks of low training (LT). At the end of each period, the swimmers performed their best event at an official competition. Individual performances were expressed as percentage of the previous season's best performance. The changes in NA levels after 4 weeks of IT were negatively related to changes in training volume (r = - 0.70, p < 0.01) and total training load (r=-0.68, p<0.02). NA levels measured at the end of IT were positively related to changes in performance after three weeks of RT (r = 0.77, p < 0.01). The percentage changes in performance between RT and LT were related to NA levels at the end of RT (r = 0.60; p < 0.04). Ad/NA ratios and Ad were related to performance (r=0.58, p<0.01; r=52, p<0.01; respectively). The differences in Ad/NA ratios and Ad between two consecutive competitions were related to the differences in performance (r=0.59, p<0.01; r=0.49, p<0.01; respectively). 24-hr NA and the Ad/NA Excretion ratio were related to both training variations and performance. Thus, 24-hr NA levels and Ad/NA ratio may provide useful markers for monitoring training stress in elite swimmers.
Juliette C Howe - One of the best experts on this subject based on the ideXlab platform.
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urinary Catecholamine Excretion in men and women between and within subject variation
Journal of Nutritional Biochemistry, 1998Co-Authors: Maria C P Souza, William V Rumpler, L W Douglass, Juliette C HoweAbstract:Twenty-two women and 12 men collected 24-hr urine samples under free-living conditions. The study was conducted to determine the variation in urinary Catecholamine Excretion between and within subjects, as well as the impact of alcohol consumption on this variation. Subjects were fed controlled diets (20% or 40% of energy from fat) for two 8-week periods; within each dietary group, subjects consumed a carrier beverage with ethanol (5% of daily energy intake) during one 8-week period. Urine samples were collected during week 5 of each period for 4 consecutive days and analyzed for epinephrine, norepinephrine, and dopamine by HPLC with electrochemical detection. There was no significant effect due to dietary fat on Catecholamines Excretion; therefore, all subjects were combined. Coefficients of variation were determined separately for men and women and for alcohol consumption within sex. Daily Excretion of epinephrine and norepinephrine was significantly greater ( P < 0.01) in men than in women. Within- and between-subject variability presented large coefficients of variation for both men (28–48%) and women (22–47%). Although within-subject variation was similar for men and women, between-subject variation was consistently greater for women than for men regardless of alcohol consumption or abstention. Alcohol consumption did not significantly affect the levels of urinary Catecholamine Excretion within sex. However, both within- and between-subject variation decreased during alcohol consumption in all subjects.